Not disagreeing that bass can generally be usefully cut with an hpf, there are definitely occasions when you want a powerful low end (as I think we mentioned elsewhere).
Two examples might be:
- reggae bass;
- a club dance vibe.
In such cases having the right kit to deliver a big low end, without it just being mud, is going to be key and typically is going involve decent sub-woofer(s) added to the tops. Beyond what my lot currently has in terms of kit, but we recently went through a pair of RCF 15" subs plus high quality tops at a function where we were sharing the PA kit of a pro DJ, and it was such a good sound!